Question

Temperatures of four liquid substances are shown in the chart.

A 2 column table with 4 rows. The first column is labeled substance with entries W, X, Y, Z. The second column is labeled temperature in degrees celcius with entries 40, 37, 19, 37.
Which statement is best supported by the data in the chart?

Substance X will transfer thermal energy to substance Y mainly through radiation if they are mixed.
Substance Y will transfer thermal energy to substance Z through conduction if they are mixed.
Substance X will transfer thermal energy to substance W through radiation if they are placed near each other.
Substance W will transfer thermal energy to substance X through conduction if they are mixed.

Answer 1

"Substance W will transfer thermal energy to substance X through conduction if they are mixed."

Reason: W is at 40°C and X at 37°C, so heat flows from the warmer substance (W) to the cooler one (X). When mixed (in contact), conduction is the primary mode of heat transfer.